netlink: 'syz-executor7': attribute type 4 has an invalid length.
netlink: 17 bytes leftover after parsing attributes in process `syz-executor7'.
INFO: task syz-executor1:26401 blocked for more than 120 seconds.
Not tainted 4.17.0-rc5+ #79
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor1 D20072 26401 4563 0x20020004
Call Trace:
context_switch kernel/sched/core.c:2859 [inline]
__schedule+0x801/0x1e30 kernel/sched/core.c:3501
schedule+0xef/0x430 kernel/sched/core.c:3545
io_schedule+0x1c/0x70 kernel/sched/core.c:5165
__blkdev_direct_IO_simple+0x7fc/0xfb0 fs/block_dev.c:241
blkdev_direct_IO+0xb5f/0x1100 fs/block_dev.c:428
generic_file_read_iter+0x510/0x2f00 mm/filemap.c:2341
blkdev_read_iter+0x120/0x190 fs/block_dev.c:1930
call_read_iter include/linux/fs.h:1778 [inline]
generic_file_splice_read+0x552/0x910 fs/splice.c:307
do_splice_to+0x12e/0x190 fs/splice.c:880
splice_direct_to_actor+0x268/0x8d0 fs/splice.c:952
do_splice_direct+0x2cc/0x400 fs/splice.c:1061
do_sendfile+0x60f/0xe00 fs/read_write.c:1440
__do_compat_sys_sendfile fs/read_write.c:1516 [inline]
__se_compat_sys_sendfile fs/read_write.c:1505 [inline]
__ia32_compat_sys_sendfile+0x187/0x290 fs/read_write.c:1505
do_syscall_32_irqs_on arch/x86/entry/common.c:323 [inline]
do_fast_syscall_32+0x345/0xf9b arch/x86/entry/common.c:394
entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139
RIP: 0023:0xf7fa9cb9
RSP: 002b:00000000f5fa50ac EFLAGS: 00000282 ORIG_RAX: 00000000000000bb
RAX: ffffffffffffffda RBX: 0000000000000013 RCX: 0000000000000013
RDX: 0000000020000040 RSI: 000000001b7889b2 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000296 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
Showing all locks held in the system:
2 locks held by khungtaskd/893:
#0: 00000000cbec8ce9 (rcu_read_lock){....}, at: check_hung_uninterruptible_tasks kernel/hung_task.c:175 [inline]
#0: 00000000cbec8ce9 (rcu_read_lock){....}, at: watchdog+0x1ff/0xf60 kernel/hung_task.c:249
#1: 00000000d9f220d2 (tasklist_lock){.+.+}, at: debug_show_all_locks+0xde/0x34a kernel/locking/lockdep.c:4470
1 lock held by rsyslogd/4397:
#0: 00000000f7f5ac82 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x1a9/0x1e0 fs/file.c:766
2 locks held by login/4487:
#0: 00000000032eae33 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365
#1: 00000000961e2092 (&tty->atomic_write_lock){+.+.}, at: tty_write_lock+0x23/0x90 drivers/tty/tty_io.c:884
2 locks held by getty/4488:
#0: 000000000e6a0824 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365
#1: 00000000e79df413 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x321/0x1cc0 drivers/tty/n_tty.c:2131
2 locks held by getty/4489:
#0: 000000004df8c986 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365
#1: 0000000008782a04 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x321/0x1cc0 drivers/tty/n_tty.c:2131
2 locks held by getty/4490:
#0: 000000001aae31a0 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365
#1: 0000000054de2cc2 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x321/0x1cc0 drivers/tty/n_tty.c:2131
2 locks held by getty/4491:
#0: 000000004c04f47e (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365
#1: 0000000072724444 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x321/0x1cc0 drivers/tty/n_tty.c:2131
2 locks held by getty/4492:
#0: 000000002c7fc644 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365
#1: 00000000e5ba9af7 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x321/0x1cc0 drivers/tty/n_tty.c:2131
2 locks held by getty/4493:
#0: 0000000035178437 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365
#1: 000000003d1ff3e7 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x321/0x1cc0 drivers/tty/n_tty.c:2131
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 893 Comm: khungtaskd Not tainted 4.17.0-rc5+ #79
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1b9/0x294 lib/dump_stack.c:113
nmi_cpu_backtrace.cold.4+0x19/0xce lib/nmi_backtrace.c:103
nmi_trigger_cpumask_backtrace+0x151/0x192 lib/nmi_backtrace.c:62
arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38
trigger_all_cpu_backtrace include/linux/nmi.h:138 [inline]
check_hung_task kernel/hung_task.c:132 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:190 [inline]
watchdog+0xc10/0xf60 kernel/hung_task.c:249
kthread+0x345/0x410 kernel/kthread.c:240
ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:412
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.17.0-rc5+ #79
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__read_once_size include/linux/compiler.h:188 [inline]
RIP: 0010:trace_lock_release include/trace/events/lock.h:58 [inline]
RIP: 0010:lock_release+0x6ea/0xa10 kernel/locking/lockdep.c:3938
RSP: 0018:ffff8801dae07a50 EFLAGS: 00000086
RAX: ffffed003b5c0f63 RBX: 1ffff1003b5c0f4f RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffffffff88c765f4
RBP: ffff8801dae07b80 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff88c765f8 R11: ffffffff88c75dc0 R12: ffff8801dae07b58
R13: ffffffff8a7158c8 R14: ffff8801dae07c68 R15: ffffffff88c75dc0
FS: 0000000000000000(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffff600400 CR3: 00000001b0bd0000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
seqcount_lockdep_reader_access include/linux/seqlock.h:82 [inline]
read_seqcount_begin include/linux/seqlock.h:164 [inline]
ktime_get+0x15b/0x430 kernel/time/timekeeping.c:763
tick_nohz_irq_enter kernel/time/tick-sched.c:1228 [inline]
tick_irq_enter+0x83/0x390 kernel/time/tick-sched.c:1249
irq_enter+0xb6/0xd0 kernel/softirq.c:346
scheduler_ipi+0x39b/0xa30 kernel/sched/core.c:1771
smp_reschedule_interrupt+0xed/0x660 arch/x86/kernel/smp.c:277
reschedule_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:887
RIP: 0010:native_safe_halt+0x6/0x10 arch/x86/include/asm/irqflags.h:54
RSP: 0018:ffffffff88c07bc0 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff02
RAX: dffffc0000000000 RBX: 1ffffffff1180f7b RCX: 0000000000000000
RDX: 1ffffffff11a30d0 RSI: 0000000000000001 RDI: ffffffff88d18680
RBP: ffffffff88c07bc0 R08: ffffed003b5c46c3 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: ffffffff88c07c78 R14: ffffffff897bef20 R15: 0000000000000000
arch_safe_halt arch/x86/include/asm/paravirt.h:94 [inline]
default_idle+0xc2/0x440 arch/x86/kernel/process.c:354
arch_cpu_idle+0x10/0x20 arch/x86/kernel/process.c:345
default_idle_call+0x6d/0x90 kernel/sched/idle.c:93
cpuidle_idle_call kernel/sched/idle.c:153 [inline]
do_idle+0x395/0x560 kernel/sched/idle.c:262
cpu_startup_entry+0x104/0x120 kernel/sched/idle.c:368
rest_init+0xe1/0xe4 init/main.c:441
start_kernel+0x906/0x92d init/main.c:737
x86_64_start_reservations+0x29/0x2b arch/x86/kernel/head64.c:445
x86_64_start_kernel+0x76/0x79 arch/x86/kernel/head64.c:426
secondary_startup_64+0xa5/0xb0 arch/x86/kernel/head_64.S:242
Code: ff 05 3b e4 a4 7e 48 ba 00 00 00 00 00 fc ff df 49 8d 44 24 c0 48 c1 e8 03 48 01 d0 c6 00 00 48 8b 15 73 24 1a 08 49 89 54 24 c0 00 f8 e8 0e 9d 06 00 85 c0 74 0d 80 3d 86 ca 19 08 00 0f 84